<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>入口函数</title>
</head>
<body>
    <script src="./jquery-min.js"></script>
    <script>
        $(document).ready(function(){
            // 此 相当于window.onload  但优于window.onload 
            // 渐变写法：$(function(){

            //})
            alert(1)

        })
    </script>
</body>
</html>